Abstract:
Gas analyzer systems and methods for measuring concentrations of gasses and in particular dry mole fraction of components of a gas. The systems and method allow for rapid measurement of the gas density and/or dry mole fraction of gases for a number of environmental monitoring applications, including high speed flux measurements. A novel coupling design allows for tool-free removal of a cell enclosing a flow path to enable in field cleaning of optical components.
Abstract:
A reagent cuvette has a first chamber with an inspection part and a socket, and a second chamber. The socket has four spikes at its base. Both chambers are sealed with a membrane. At the point-of-care the foil membrane of the first chamber is peeled away by the therapist (typically general practitioner doctor). A sample, such as blood, is added to the chamber using a pipette or other device to provide a verifiable quantity of sample. This provides a mixture of a buffer reagent supplied in the chamber and the sample injected into the inspection chamber at the point of care. The chamber is then inserted into the socket by gently pressing it down so that its foil membrane is broken by the spikes. This causes the starter reagent to drop down from within the second chamber into the inspection part of the first chamber. The inspection part is then inserted into an optical inspection instrument for analysis of the two reagents and the sample mixed together.
Abstract:
The present disclosure is directed to an apparatus and method for studying dissolution of a compact sample. The compact sample is typically a pharmaceutical drug sample. A flow-through apparatus includes a frame defining a flow-through channel, a removable insert having a drug sample, the insert positioned within the frame such that a fluid interacts with the sample when the fluid passes through the flow channel. The frame has an opening on the top side to allow a glass plate, typically a microscope cover slip to be positioned within the frame and allow viewing of the fluid flow and interaction with the drug sample. The hydrodynamics of the fluid flow are either known or computed. Thus, dissolution can be studied and observed in view of hydrodynamic characteristics. Typically, only a small amount of sample is necessary for a study. The flow-through apparatus is designed to fit on a microscopy stage and allow visual observation of the fluid/sample interaction.
Abstract:
A wavelength correction function provides corrected reflectance values from actual reflectance values taken in a reflectance-base instrument. The correction is provided as a function of measured reflectance values and a predefined set of high resolution reflectance values established for the reflectance-based instrument implementing the wavelength correction function.
Abstract:
A reagent cuvette (1) has a first chamber (2) with an inspection part (5) and a socket (6), and a second chamber (3). The socket (6) has four spikes (20) at its base. Both chambers are sealed with a membrane. At the point-of-care the foil membrane (7) of the first chamber (2) is peeled away by the therapist (typically general practitioner doctor). A sample, such as blood, is added to the chamber (2) using a pipette or other device to provide a verifiable quantity of sample. This provides a mixture of a buffer reagent supplied in the chamber (2) and the sample injected into the inspection chamber 2 at the point of care. The chamber (3) is then inserted into the socket (6) by gently pressing it down so that its foil membrane is broken by the spikes (20). This causes the starter reagent to drop down from within the second chamber (3) into the inspection part (5) of the first chamber (2). The inspection part (5) is then inserted into an optical inspection instrument for analysis of the two reagents and the sample mixed together.
Abstract:
A device, system and method for portable fluorescence detection. The portable device of the present invention features a low power light, in which a wavelength range is defined as at least one wavelength of light. The light source is preferably highly energy efficient, such that a majority of the electrical power which is consumed is then converted into transmitted light. The emitted light from the excited fluorophore is then preferably detected with any low cost and low power photodetector. Although optionally a highly sensitive optical detector may be used, preferably fluorescence is detected with any light sensing device, such as a regular photodiode or a CCD (charge-coupled device) sensor for example.
Abstract:
A tray assembly for use with an apparatus adapted to inspect a liquid sample, including a support tray insertable within an inspection location within the liquid sample inspection apparatus so that a light source of the apparatus illuminates a liquid sample carried on the support tray and a detector of the apparatus receives light from the liquid sample when the support tray is positioned at the inspection location, and an insert supported within the support tray and having a first surface adapted to receive a first type of liquid carrier and a second surface adapted to receive a second type of liquid carrier different from the first type of liquid carrier.
Abstract:
Disclosed is an optical flow cell (100, 300) and a method (400) for bioprocessing applications. The optical flow cell (100, 300) comprises a fluid inlet (102, 302), a fluid outlet (104, 304), and a fluid flow channel (106, 306) provided between said fluid inlet (102, 302) and said fluid outlet (104, 304). The optical flow cell (100, 300) also comprises an output optical waveguide (108, 308) configured to emit light into said fluid flow channel (106, 306), and a collector optical waveguide (110, 310) configured to collect light from said fluid flow channel (106, 306). An optical pathlength adjuster (120, 320) for varying the optical pathlength (130, 330) between said output optical waveguide (108, 308) and said collector optical waveguide (110, 310) is also provided.
Abstract:
In a sample analyzing apparatus, an injector assembly injects a reagent onto a sample, and luminescent light from the sample is transmitted to a detector. The assembly may be movable toward and away from the sample. The assembly may include one or more needles that communicate with one or more reservoirs supplying reagent or other liquids. The assembly may include a light guide for communicating with the detector. A cartridge may be provided in which the assembly, one or more reservoirs, and one or more pumps are disposed. The cartridge and/or the apparatus may be configured for enabling rinsing or priming to be done outside the apparatus. The cartridge and/or the apparatus may include one or more types of sensors configured for detecting, for example, the presence of liquid or bubbles in one or more locations of the apparatus and/or the cartridge.
Abstract:
The present invention is directed to a novel method to multiplex long lifetime fluorescent dyes using time-resolved fluorescence (TRF) detection. A combination of spectral and temporal differences in fluorescence emission is used to enhance the ability to separate signals in an assay from multiple dyes. Multiplexed TRF detection apparatuses and systems configured for performing all or part of any of the methods disclosed herein are also provided, particularly apparatuses and systems incorporating cartridge-based multi-mode readers.